Tongue-shaping machine.



G. W. BORG. TONGUE SHAPING MACHINE.

APPLICATION FILED SEPT. 20, 1906.

Patented J an. 12, 1909.

CHARLES W. BORG, OF ROCK ISLAND, ILLINOIS.

TONGUE-SHAPING MACHINE.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application filed September 20, 1906. Serial No. 335,495.

To all whom it may concern:

Be it known that I, CHARLES W. Bone, a citizen of the United States,residing at Rock Island, in the county of Rock Island and State ofIllinois, have invented certain new anduseful Improvements in Tongue-$haping Machines, of which the following is a specification, referencebeing had therein to the accompanying drawing.

My invention relates to improvements in the tongue shaping machine forwhich Letters Patent were granted to me on the 13th day of September,1904, No. 7 69,980, and the object of the present improvement is toreduce the friction between the supporting table and the moving blank orwork-piece, which friction may become excessive when the blank is warpedor sprung and it becomes necessary to apply heavy pressure to bring itinto contact with the work-table. This and other advantages are securedby the construction shown in the accompanying drawings, in which Figure1 is a side view of the machine of the patent above referred to, showingthe application of my improvements thereto; Fig. 2 is a side elevation,partially in section of the improved feed mechanism; Fig. 3 is a plan ofthe same; Fig. 4 is a section on the line IVIV of Fig. 3 showing one ofthe feed bars and supporting means therefor, and Fig. 5 is a plan view,on a reduced scale, of the laterally-movable sidedressing cutterheadsand the controlling means therefor.

1 represents the main frame of the machine, 2 the feed table extensionthereof, 3 the primary feed-apron or movable table of my presentimprovement, 4 the secondary feed-apron, 5 an intermediate stationarytable section, hereinafter referred to, 6 the timed feed chaincorresponding to the feedchain 4 of said Patent No. 769,980, abovementioned, and hereinafter more fully described, 7 the main drivingshaft for the feed mechanism, 8 a sprocket wheel on shaft 7, said wheelbeing connected to a sprocket wheel 9, of the same diameter and numberof teeth, by a sprocket chain 10. The wheel 9 is mounted on the drivingshaft 11 of the secondary feed-apron mechanism 4, so that both primaryand secondary aprons travel at the same lineal speed; as will be readilyunderstood.

12, 13 are the driven shafts of the primary and secondary aprons,respectively.

Each of'the shafts'7, ll, 12 and 13 carry paired sprocket wheels 14, 15,16 and 17, respectively, which wheels carry and propel the chains l8, 19to which chains are secured the movable feed bars 20, 21, whichconstitute the feed-aprons, or the feed bars themselves may constitutelinks of the chain. Each of said feed bars is provided with anintermediate recess 22, adapted to form a chain seat for the feed-chain6, as will be more fully described hereafter.

In each of the chain-seats of the feed-bars 20 is formed or secured asprocket tooth 23, adapted to operatively engage spaces between thelinks of the feed-chain 6, to drive the same synchronously with themovement of the feed-bars 20. The feed chain 6 is, as in the originalpatent mentioned, provided at suitable intervals with work-driving andcentering spurs 24, and also with a suitable number (say three)feed-teeth 25; said feed teeth being so located and timed with respectto the cutter actuating cams 26 as to feed the blanks or work-pieces atthe proper intervals to be profiled as desired; all as fully describedin the beforementioned patent. The side-dressing cutters c, c, arecarried by frames j 7", each pivoted as at p and each controlled by alink Z carrying a roll-holding collar 6 upon which is mounted a roll 1"bearing upon the controlling-cam 26, as clearly shown in Fig. 5 and inmy prior patent.

To assist the spurs 24 in-their centering and driving action, thefeed-bars 20 and 21 are preferably diagonally ridged or fluted, as shownat 27 in Figs. 3 and 4, the ridges on opposite sides of the chain seatsoppositely inclined, as illustrated.

It should be noted that the top faces of all the parts supporting theblank during its movement through the machine are in the same horizontalplane, namely, the feed table 2, feed bars-20, 21 and the stationarytable-section 5. As in Patent No. 769,980 the chain-way in thefeed-table is depressed to drop the feed chain and centering spurs 24sufiiciently to bring the spur points on a level with the feed-tableface; but, instead of providing said waywith upwardly inclined portions,as in the former construction, the chain seats 22 of the feed bars ofthe present improvement are made of such depth that their bottoms serveto lift and hold up the chain for the purpose of forcing the centeringspurs 24 into the blank and retaining them there during the action ofthe cutters.

being '7 To rigidly support the feed bars themselves at the properheight to permit them to make the working turn around their supportingshafts without presenting their top corners by the side-dressing andchamfering knives, successively; the feed-chain leaving its seats in thebars 21 and passing through the chainway 30 of the table 5, butmaintaining the above the plane of the work-table face, the -lateralguiding control of the spurs 24:. This sprocket wheels 14, 15, 16 and 17are journaled atthe proper points in the main frame, and the frame is,moreover, provided with slide-ways 28, which have a slight downwardcurve at their ends, as at 29, to facilitate the receiving anddischarging of the feed-bars. These slide-ways not only form anunyielding support for the bars at the proper level butthey are solocated as to prevent movement of the bars in the direction of theirlength and may be constantly and amply lubricated so as to'occasion muchless friction than that between the workpiece and the stationarytable-top in the former construction.

The intermediate stationary table-section 5 is inserted to permit theaction of the sidedressing heads and chamfering heads of the machine, asfully explained in the prior patent, and this section is provided with achain-way of suitable depth to maintain the feed-chain at a constantlevel during its feeding action. As the side-dresshg and chamferingheads are controlled by the workpiece itself, no holding down roll isnecessary at this part of the table, and the sliding friction betweenthe blank and the table is inconsiderable.

The operation of my improvement is as follows: Power being applied tothe shaft 7 a blank placed on the feed-table 2 is first slid forwardsolely by the travel ofone of the feedteeth 25; this sliding feed beingsufficient at this point of the travel since, as yet, the blank issubjected to no pressure nor cutting action. As the bottom face of thefor ward end of the blank leaves table 2, it is supported in the sameplane and carried onward by the feed-bars 21 which are continuouslyreturned around the sprocket wheels 17 and move into the plane of thework-table face, at the same time presenting a depressed way for thefeed chain and lifting the links of said chain sufficiently to force thespurs 24 into the lower face of the blank, while the upper faces of thelinks remain slightly below the ridged upper faces of the feed bars. Assoon as the forward end of the blank contacts with the feed-bar. itpasses beneath the first of the pressure rollers which serve the triplepurpose of holding the blank while the feed-chain spurs are forced intoit, of straightening the blank horizontally and holding it down upon theapron sufliciently l to give the ridged faces of the feed-bars a drivinghold upon the blank to positively feed it. After passing beneath thetop-dressing knife, the forward end of the blank leaves the apron 4 andslides along the stationary table section 5, being there shaped controlis an important consideration in shaping blanks too short to retain theside uiding and feed power of either feed-apron in its transit from oneapron to the other.

After passing the table section 5, the forward end of the blank ispicked up by the bars 20, the seats22 and sprocket teeth 23' of whichbars thereafter support and propel the feed chain until they 'recededownwardly around the sprockets 14:. Lastly, the blank is depressed andbacked by the last pair of pressure-rolls while its lower surface isdressed by the cutter located just beyond the end of the apron 3.

While the spurs 24 are primarily relied upon to center and laterallyguide the blank,

considerable side strain is thrown upon the spurs by the tendency of atwisted blank to lead heavily one side or the other of the table byreason of the greater friction on that part ofthe blank which maycontact with the stationary table wholly on one side of the feed-chainand spurs; a tendency which is often increased by the pressure of theholding-down rolls. It will be seen that such lead will be entirelyobviated by the substitution of a forward carry feed for the ordinaryslide feed.

hat I claim is 1. In a wood-working machine, in combination, anendless'traveling feed-apron and an endless feed-chain surrounding saidapron and traveling at the same lineal speed.

2. In a wood-working machine, in combination, laterally movable cutters,means for controlling said cutters, an endless feedapron, a feed-chainoperatively connected therewith, and means for driving said feedchain intimed relation to said cutter-controlling means.

3. In a woodworking machine, in combination, an endless travelingfeed-apron comprising bars having depressed seats, and a feed-chainlocated in said seats and adapted to be driven in unison with said feedbars.

4. In a wood-working machine, in comcornprising bars having depressedseats, sprocket-teeth in said seats, and a feed chain constructed andarranged to be driven by said sprocket-teeth.

bination, primary and secondary endless traveling feed-apr0ns,vertically journaled cutter-heads located between said feedaprons, and afeed chain surrounding said feedl-aprons and traveling in unisontherewit r c 6. In a wood-working machine, in combination, an endlesstraveling feed-apron 5. In a wood-working machine, in comthe ridges orflutes 27 are desirable when any 7 bination, laterally movable cutters,means for controlling said cutters, a plurality of endless movablefeed-aprons, a feed chain operatively connected with said aprons, andmeans for driving said feed chain in timed relation with said cuttercontrolling means.

7. In a wood-working machine, in combination, a plurality of endlessmovable feedaprons, a stationary table section between said aprons,laterally-movable cutters in operative relation with said table-section,means for controlling said cutters, a feedoperative relation with saidtable-section, chain operatively connected with said aprons, and meansfor driving said chain in timed relation to said cutter-controllingmeans.

8. In a woodworking machine, in combination, cutters constructed andarranged to dress the top, sides and bottom of a blank, primary andsecondary endless traveling feed-aprons, and a feedchain surroundingsaid aprons and traveling in unison therewith.

9. In a wood-working machine, in combination, cutters constructed andarranged to dress the top, sides and bottom of a blank, primary andsecondary endless, traveling feed-aprons, an interposed stationarytablesection, power connections between said aprons for driving the samein unison, and a feed-chain surrounding said aprons and driven in unisontherewith.

1Q. In a woodworking machine, in combination, an endless travelingfeed-apron, a feed-chain supported thereon and drivin connectionsbetween said apron and chain.

11-. In a woodworking machine, in combination, an endless, travelingfeed-apron having a depressed chain-Way, a feed-chain supported in saidchain-Way below the Working face of said apron, and driving connectionsbetween said apron and chain.

12. In a wood-working machine, in combination, an endless, travelingfeed apron having a longitudinally-arranged groove in the working facethereof, and a superposed feed-chain working in said groove.

18. In a Woodworking machine, an endless, traveling feed-apron having acontinuous, depressed chain-way in the working face thereof andsprocket-teeth located in said chain-way.

1 L. In a woodworking machine, in combination, laterally-movablecutters, and a feed apron traveling between said cutters and having itsfeeding face diagonally scored at opposite inclinations upon either sideof its longitudinal center line to prevent lateral movement of the blankcarried thereby.

15. In a wood-working machine, in combination, laterally-movablecutters, means for controlling said cutters, and an endless, travelingfeed-apron having its feeding face diagonally scored to prevent lateralmotion of the workpiece during the movement of said cutters.

16. In a wood-working machine, an endless, traveling feedaproncomprising feedbars, ways for supporting and laterally guiding saidbars, the working faces of said bars being transversely scored toprevent lateral motion of the Work-piece carried thereby.

In testimony whereof I affix my signature, in presence of two witnesses.

CHARLES W. BORG.

Witnesses MARSHALL BECK,

IV. C. GILMORE.

